Tip-printing press.



M. LINDEMAN. TIP PRINTING PRESS.

APPLICATION FILED MAR. 7, 1912. I 1,042,014, Patented 001;. 22, 1912.

2 SHEETS-SHEET \OLUMIIA PLANOGRAPH CO., WASHINGTON, D- G- M. LINDEMAN.

TIP PRINTING PRESS.

APPLICATION FILED MAR. v, 1912.

Patented Oct. 22, 1912.

2 SHEETSSHBET 2.

COLUMBIA PLANOGRAPH c0.,wA.sl-HNOTON. D. c.

UNITED STATES PATENT ()FFTQE.

MAX LINDEMAN, OF OWEGO, NEW YORK, ASSIGNOR OF ONE-FOURTH T0 LEONIDAS A. VAN PRAAG, OF NEW YORK, N. Y.

TIP-PRINTING- PRESS.

Specification of Letters Patent.

Patented Oct. 22, 1912.

Application filed March 7, 1912. Serial No. 682,144.

.T 0 all whom it may concern;

Be it known that I, MAX LINDEMAN, a citizen of the United States, and a resident of the city of Owego, county of Tioga, State of New York, have invented certain new and useful Improvements in Tip- Printing Presses, of which the following is a full, clear, and exact description.

It is the purpose of this invention to so construct presses of the class stated as that the following series of advantages may be realized. It will not be necessary to describe the construction and operation of such presses heretofore used for the purpose, and compare them with this present invention. It will be sufiicient to say that from my somewhat extensive use of the old forms and also that which is the subject matter of this invention, I know that the latter possesses the following important advantages: first: an increased output of from twenty to thirty five per cent, depending upon the character of the work done; second: marked improvement in the character of the work; third: clean, sharp action of the die, producing well defined outlines of all lettering and other features of the impression; fourth: both hands of the operator are free to manipulate the work, the press being actuated by foot power; fifth: the labor required to operate the press is much less, consequently reducing the fatigue resulting therefrom; sixth: ability to quickly and accurately adjust the platen of the press to conform accurately to the die and correct any inequalities either in the die or in the platen, initially present or resulting from irregular expansion and contraction; seventh: great simplicity and hence durability in construction; eighth: simple and readily effected adjustments for all parts of the press and not requiring technical or mechanical skill for their manipulation; ninth: low initial cost and very slight maintenance charges.

Referring to the drawings, Figure 1 illustrates a side elevation of a press embodying the invention; Fig. 2 illustrates a front view of that which is shown in Fig. 1; Fig. 3 illustrates a plan view of that which is shown in Fig. 1; Fig. 4 illustrates a rear view of that which is shown in Fig. 1; Fig. 5 illustrates a plan view of the platen of the press; Fig. 6 illustrates a detail of the supporting and adjusting devices for the platen.

1 represents the frame of the press, 2, 2, the front and rear legs therefor, 3, 3, upwardly extending brackets within which is pivoted an arm 4, provided with a wide hub 5, through which extends the axis 6 the ends of which are in effect trunnions on which the arm oscillates, 7 an adjustable counterpoise weight on the rear end of the arm, 8 a retractile spring which has sufficient stiffness so that co-acting with the counterpoise 7, it will normally elevate the front end of the arm 4.

9 is the heating box on the front end of the arm 4. It is, in the instance shown, heated by electricity which is conveyed to the box through line wires 10.

11 is the die placed in the under side of the heating box 9 and fastened therein by set screws 12, or in any other preferred manner. The seat in the heating box 9 for the reception of the die is made of such size as will readily receive the largest die used.

13 is the pedal rod, provided with an adjusting device 14, shown in the drawings as made in the form of a turn buckle. The upper end of the rod 13 hooks into the eye 15 or is otherwise connected to the arm 4. The rod is provided with set nuts 16, 16, so that when the length of the rod is properly adjusted, the set nuts 16 may be screwed up tight, thus maintaining the parts in their then position. The supporting legs 2 of the press are short in the example shown, since it is intended that the press shall rest upon the top of a bench or table and consequently the pedal rod 13 extends downwardly through the table and is provided with a suitable pedal, not shown, at or near the floor. If desired, the legs may be ex tended so that the structure will embody its own means of support extending to the floor. I prefer the construction shown, however, because when so made, the press proper is more compact, less bulky and less heavy, consequently more easily installed and transported.

17 is the platen of the press. It is supported upon three or preferably four screw threaded bolts 18. The upper ends of these bolts are made conical, as shown at 19 in Fig. 6, and enter concave recesses 20 made in the under side of the platen which is preferably thickened as at 21 adjacent to the place where the concave recesses are located. The bolts 18 are threaded into suitably located and threaded holes in the base plate 1 and are provided with set nuts 22 and the upper conical part or head 19 of the bolt is made angular on its sides, so that the bolts can be readily turned with a wrench.

I prefer to cover the face of the platen with one or two layers 23 of material other than metal, as, for instance, card board, leather, or the like, and also to locate in a suitably made recess in the face of the platen, a square of wood 24, see Fig. 5, which may be held in place by screws 25, or in any other preferred manner. The purpose of using this relatively soft covering 23 and the square of wood 24: is to prevent injury to the die and also to the work, which might result if they were handled and moved upon a rigid and unyielding surface, such as the face of the metal platen itself. These features are not, however, essential. The platen may be metal throughout, if preferred, although if so, it is desirable to have a leather or similar yielding body, such as that shown at 26, immediately beneath the die.

27 is a spring which engages in an eye 28 on the under side of the platen 17 and connects with a thumbscrew 29 and bolt 30 which passes through a bridge 31 which extends across the frame 1 of the press table and is supported by it.

The operation is as follows: The die being in place in the heating box, the current, or equivalent means, is brought into action and the heat in due course is transmitted from the heating box 9 to the die 11 and a particularly advantageous feature of this inven tion is that in this way the die is heated from the back side, the heat being transmitted therefrom to its front or operative surface, and thus there is no burning of the die tending to its destruction, nor any deposit of objectionable material thereon, which interferes with the perfection of the work. After the die is placed in the heating box and securely clamped by the set screw 12, itis in the first instance carefully brought down upon the platen 17 of the press and the operator then observes whether the engagement between the two is true and accurate throughout. If not, by suit-able manipulation of the adjusting screws 18, in a manner well understood, the platen is elevated or depressed or inclined as needful to make it exactly register with the face of the die, so as to secure perfect uniformity of impression throughout, in so doing the spring 27 which is maintained under constant tension by proper manipulation of the thumb screw 29 holds the platen at all times firmly upon the upper conical ends of the bolts 18 and the adjustment is effected by loosening the set nuts 22 and suitable manipulation of the bolts 18 through their squared upper ends 19. After the adjustment between these parts has been accurately attained, the workman passes the work under the die and for so doing has both his hands free, thus greatly expediting the operation, for no manual act is necessary in the operation of the press. It is operated entirely by the pedal. After the operator has adjusted his work properly upon the platen, he pressesupon the pedal with his foot, whereupon the pedal rod 13 causes the lever 4 to tip forwardly and downwardly, overcoming the weight of the counterpoise 7 and the stress of the spring 8, until the heated die is brought down upon the work. Thereupon a momentary pressure is applied, the pedal is released and the counterpoise and spring again return the lever and die to their primary elevated position. In this way the work continues indefinitely.

It will be obvious to those who are familiar with this art that modifications may be made in the details of construction without departing from the essentials of the invention. I therefore do not limit myself to the exact construction of the parts as illustrated, since they show one form only in which the invention may be embodied.

I claim as of my invention:

The combination in a tip printing press of a horizontally arranged platen supported upon its under side by vertically adjustable screws the upper ends of which are point-ed, sockets on the under side of the platen within which the points of the screws engage, a spring which normally holds the platen upon the point-ed ends of the screws, a tension device to increase the tension of said spring, a pivoted lever adapted to be swung downwardly upon the platen, a heating box attached to the front end of the lever, devices carried by the lever to heat the said box, means to attach a die to the under side of the heating box, means upon the end of the lever opposite the heating box, which normally elevate it and means whereby the lever may be oscillated by foot power.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MAX LINDEMAN.

WVitnesses:

FRANK A. DAnnow, FRED C. HILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of I'atents, Washington, D. G. 

